Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2018-02-25 — OH
Operator
Columbia Gas Of Ohio Inc
Cause
Other Incident Cause
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,200
Incident datetime
2018-02-25 00:33
Report number
Location
OH, RICHLAND
Narrative
On february 25, 2018, richland county 911 reported a fire and possible explosion at 613 fleming falls road in mansfield, ohio at 12:33 am to columbia gas of ohio, inc ("columbia"). Columbia's service technician was dispatched at 12:42 am and arrived on site at 01:15 am and found that gas had been shut off at the meter valve by the fire department. Additional columbia resources arrived on site at 1:50 am to assist in the response to the incident. Columbia employees set up a perimeter and evacuated the neighboring home at 605 fleming falls where natural gas readings were discovered in the basement. Columbia verified that the system pressure was within the maop established for that system and that odorant was compliant with state and federal requirements. Electric meters were removed to eliminate sources of ignition and columbia began to search for leakage and ensure safety. The night of the incident there was a tremendous amount of rain that caused the sanitary lift pumps to fail and may have potentially pushed a slug of sewer gas into the basement via floor drains that were found to be tied directly to the sanitary sewer for 605 and 613 fleming falls rd. The explosion that occurred appears to be a low level explosion. Columbia located and repaired a total of four leaks of which we believe to be non-causal. The closest being approximately 290' away and the furthest being approximately 1300' away from the incident. The surface level of the south side of the street is approximately 12' lower than the surface level of the street in front of the incident site. Columbia created a temporary bypass to keep customers in service, abandoning approximately 775' of bare steel high pressure mainline on the south side of the street. Columbia pressure tested the bare steel main on the south side of the street along with the services (with no drop in pressure at 76 psig) and ran a camera inside them to ensure all service tees were accounted for and to look for anomalies. Columbia tested approximately 448' of high density poly ethylene (hdpe) main line and 6 services on the north side of the street and it successfully passed several pressure tests at 76 psig (operating pressure), 15 inches water column and 150 psig. In addition columbia tested approximately 1,175' of hdpe main line and service on the street behind incident site. At 613 fleming falls rd., columbia pressure tested the service line and checked the service regulator for lock up and flow without issue and no leakage detected. The service line at the neighboring home (637 fleming falls rd) was also tested and found to be leak free. Columbia did exploratory excavation around the area to ensure conduits did not exist that could convey migrating gas. Columbia also ran a camera in the sanitary main and sewer laterals to ensure that a cross bore did not exist. Un-collapsed storm sewers were videoed as well to ensure a cross bore did not exist. Columbia worked with the puco, state fire marshall, a third-party cause and origin specialist, and a geologist to determine a cause. Laboratory gas analyses and our geologist's interpretation indicate that the stray gas samples had a comparable isotopic composition and molecular profile, and is similar in origin to columbia's pipeline gas, however, naturally occurring methane containing similar molecular and isotopic profile cannot be completely ruled out as a potential source. The geologist theorizes that ground water, in combination with the abundance of rain water, likely created conditions favorable for gas migration toward the structures at 605 and 613 fleming falls rd. Columbia has determined that the cause of this incident cannot be fully ascertained. Please consider this report a final report. Note: updated latitude and longitude 9-21-18
Detailed record list
Occurred At
2018-02-25 00:33:00
Year
2018
Report Received Date
2018-03-27 00:00:00
Iyear
2018.0
Report Number
20180036.0
Supplemental Number
30966.0
Report Type
Supplemental Final
Operator Id
2596
Name
Columbia Gas Of Ohio Inc
Operator Street Address
290 W Nationwide Blvd
Operator City Name
Columbus
Operator State Abbreviation
OH
Operator Postal Code
43215
Local Datetime
2018-02-25 00:12:00
Location Street Address
613 Fleming Falls Rd.
Location City Name
Mansfield
Location County Name
Richland
Location State Abbreviation
OH
Location Postal Code
44905-1430
Location Latitude
40.7851556
Location Longitude
-82.49163333
Nrc Rpt Datetime
2018-02-25 02:17:00
Nrc Rpt Num
1205179
Commodity Released Type
Natural Gas
Unintentional Release
0.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
Yes
Explode Ind
Yes
Num Pub Evacuated
9.0
Incident Identified Datetime
2018-02-25 00:33:00
On Site Datetime
2018-02-25 01:15:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under A Building
Crossing
No
Pipe Facility Type
Investor Owned
System Part Involved
Other
System Part Details
Unknown
Material Involved
Unknown
Release Type
Other
Release Type Details
Unknown Please See Narrative
Class Location Type
Class 3 Location
Est Cost Oper Paid
54000.0
Est Cost Prop Damage
1200.0
Est Cost Emergency
322000.0
Est Cost Other
15000.0
Est Cost Other Details
Laboratory Gas Analysis
Est Cost Unintentional Release
0.0
Prpty
392200.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
2.0
Accident Psig
76.0
Normal Psig
76.0
Mop Psig
86.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Other Incident Cause
Cause Details
Unknown
Other Type
Unknown
Unknown Subtype
Investigation Complete, Cause Of Incident Unknown
Preparer Name
R** S****
Preparer Title
Manager Of Compliance
Preparer Email
R******@n*******.com
Preparer Telephone
6148182110
Preparer Fax
6148182151
Authorizer Name
R** S****
Authorizer Title
Manager Of Compliance
Authorizer Telephone
6148182110
Authorizer Email
R******@n*******.com
Narrative
On february 25, 2018, richland county 911 reported a fire and possible explosion at 613 fleming falls road in mansfield, ohio at 12:33 am to columbia gas of ohio, inc ("columbia"). Columbia's service technician was dispatched at 12:42 am and arrived on site at 01:15 am and found that gas had been shut off at the meter valve by the fire department. Additional columbia resources arrived on site at 1:50 am to assist in the response to the incident. Columbia employees set up a perimeter and evacuated the neighboring home at 605 fleming falls where natural gas readings were discovered in the basement. Columbia verified that the system pressure was within the maop established for that system and that odorant was compliant with state and federal requirements. Electric meters were removed to eliminate sources of ignition and columbia began to search for leakage and ensure safety. The night of the incident there was a tremendous amount of rain that caused the sanitary lift pumps to fail and may have potentially pushed a slug of sewer gas into the basement via floor drains that were found to be tied directly to the sanitary sewer for 605 and 613 fleming falls rd. The explosion that occurred appears to be a low level explosion. Columbia located and repaired a total of four leaks of which we believe to be non-causal. The closest being approximately 290' away and the furthest being approximately 1300' away from the incident. The surface level of the south side of the street is approximately 12' lower than the surface level of the street in front of the incident site. Columbia created a temporary bypass to keep customers in service, abandoning approximately 775' of bare steel high pressure mainline on the south side of the street. Columbia pressure tested the bare steel main on the south side of the street along with the services (with no drop in pressure at 76 psig) and ran a camera inside them to ensure all service tees were accounted for and to look for anomalies. Columbia tested approximately 448' of high density poly ethylene (hdpe) main line and 6 services on the north side of the street and it successfully passed several pressure tests at 76 psig (operating pressure), 15 inches water column and 150 psig. In addition columbia tested approximately 1,175' of hdpe main line and service on the street behind incident site. At 613 fleming falls rd., columbia pressure tested the service line and checked the service regulator for lock up and flow without issue and no leakage detected. The service line at the neighboring home (637 fleming falls rd) was also tested and found to be leak free. Columbia did exploratory excavation around the area to ensure conduits did not exist that could convey migrating gas. Columbia also ran a camera in the sanitary main and sewer laterals to ensure that a cross bore did not exist. Un-collapsed storm sewers were videoed as well to ensure a cross bore did not exist. Columbia worked with the puco, state fire marshall, a third-party cause and origin specialist, and a geologist to determine a cause. Laboratory gas analyses and our geologist's interpretation indicate that the stray gas samples had a comparable isotopic composition and molecular profile, and is similar in origin to columbia's pipeline gas, however, naturally occurring methane containing similar molecular and isotopic profile cannot be completely ruled out as a potential source. The geologist theorizes that ground water, in combination with the abundance of rain water, likely created conditions favorable for gas migration toward the structures at 605 and 613 fleming falls rd. Columbia has determined that the cause of this incident cannot be fully ascertained. Please consider this report a final report. Note: updated latitude and longitude 9-21-18
| Occurred At | 2018-02-25 00:33:00 |
|---|---|
| Year | 2018 |
| Report Received Date | 2018-03-27 00:00:00 |
| Iyear | 2018.0 |
| Report Number | 20180036.0 |
| Supplemental Number | 30966.0 |
| Report Type | Supplemental Final |
| Operator Id | 2596 PHMSA Enforcement |
| Name | Columbia Gas Of Ohio Inc |
| Operator Street Address | 290 W Nationwide Blvd |
| Operator City Name | Columbus |
| Operator State Abbreviation | OH |
| Operator Postal Code | 43215 |
| Local Datetime | 2018-02-25 00:12:00 |
| Location Street Address | 613 Fleming Falls Rd. |
| Location City Name | Mansfield |
| Location County Name | Richland |
| Location State Abbreviation | OH |
| Location Postal Code | 44905-1430 |
| Location Latitude | 40.7851556 Google Maps OpenStreetMap |
| Location Longitude | -82.49163333 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2018-02-25 02:17:00 |
| Nrc Rpt Num | 1205179 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | Yes |
| Explode Ind | Yes |
| Num Pub Evacuated | 9.0 |
| Incident Identified Datetime | 2018-02-25 00:33:00 |
| On Site Datetime | 2018-02-25 01:15:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under A Building |
| Crossing | No |
| Pipe Facility Type | Investor Owned |
| System Part Involved | Other |
| System Part Details | Unknown |
| Material Involved | Unknown |
| Release Type | Other |
| Release Type Details | Unknown Please See Narrative |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 54000.0 |
| Est Cost Prop Damage | 1200.0 |
| Est Cost Emergency | 322000.0 |
| Est Cost Other | 15000.0 |
| Est Cost Other Details | Laboratory Gas Analysis |
| Est Cost Unintentional Release | 0.0 |
| Prpty | 392200.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 2.0 |
| Accident Psig | 76.0 |
| Normal Psig | 76.0 |
| Mop Psig | 86.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Other Incident Cause |
| Cause Details | Unknown |
| Other Type | Unknown |
| Unknown Subtype | Investigation Complete, Cause Of Incident Unknown |
| Preparer Name | R** S**** |
| Preparer Title | Manager Of Compliance |
| Preparer Email | R******@n*******.com |
| Preparer Telephone | 6148182110 |
| Preparer Fax | 6148182151 |
| Authorizer Name | R** S**** |
| Authorizer Title | Manager Of Compliance |
| Authorizer Telephone | 6148182110 |
| Authorizer Email | R******@n*******.com |
| Narrative | On february 25, 2018, richland county 911 reported a fire and possible explosion at 613 fleming falls road in mansfield, ohio at 12:33 am to columbia gas of ohio, inc ("columbia"). Columbia's service technician was dispatched at 12:42 am and arrived on site at 01:15 am and found that gas had been shut off at the meter valve by the fire department. Additional columbia resources arrived on site at 1:50 am to assist in the response to the incident. Columbia employees set up a perimeter and evacuated the neighboring home at 605 fleming falls where natural gas readings were discovered in the basement. Columbia verified that the system pressure was within the maop established for that system and that odorant was compliant with state and federal requirements. Electric meters were removed to eliminate sources of ignition and columbia began to search for leakage and ensure safety. The night of the incident there was a tremendous amount of rain that caused the sanitary lift pumps to fail and may have potentially pushed a slug of sewer gas into the basement via floor drains that were found to be tied directly to the sanitary sewer for 605 and 613 fleming falls rd. The explosion that occurred appears to be a low level explosion. Columbia located and repaired a total of four leaks of which we believe to be non-causal. The closest being approximately 290' away and the furthest being approximately 1300' away from the incident. The surface level of the south side of the street is approximately 12' lower than the surface level of the street in front of the incident site. Columbia created a temporary bypass to keep customers in service, abandoning approximately 775' of bare steel high pressure mainline on the south side of the street. Columbia pressure tested the bare steel main on the south side of the street along with the services (with no drop in pressure at 76 psig) and ran a camera inside them to ensure all service tees were accounted for and to look for anomalies. Columbia tested approximately 448' of high density poly ethylene (hdpe) main line and 6 services on the north side of the street and it successfully passed several pressure tests at 76 psig (operating pressure), 15 inches water column and 150 psig. In addition columbia tested approximately 1,175' of hdpe main line and service on the street behind incident site. At 613 fleming falls rd., columbia pressure tested the service line and checked the service regulator for lock up and flow without issue and no leakage detected. The service line at the neighboring home (637 fleming falls rd) was also tested and found to be leak free. Columbia did exploratory excavation around the area to ensure conduits did not exist that could convey migrating gas. Columbia also ran a camera in the sanitary main and sewer laterals to ensure that a cross bore did not exist. Un-collapsed storm sewers were videoed as well to ensure a cross bore did not exist. Columbia worked with the puco, state fire marshall, a third-party cause and origin specialist, and a geologist to determine a cause. Laboratory gas analyses and our geologist's interpretation indicate that the stray gas samples had a comparable isotopic composition and molecular profile, and is similar in origin to columbia's pipeline gas, however, naturally occurring methane containing similar molecular and isotopic profile cannot be completely ruled out as a potential source. The geologist theorizes that ground water, in combination with the abundance of rain water, likely created conditions favorable for gas migration toward the structures at 605 and 613 fleming falls rd. Columbia has determined that the cause of this incident cannot be fully ascertained. Please consider this report a final report. Note: updated latitude and longitude 9-21-18 |
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